CN214270532U - Membrane filtration concentrate system is handled to electrooxidation method - Google Patents
Membrane filtration concentrate system is handled to electrooxidation method Download PDFInfo
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- CN214270532U CN214270532U CN202022920948.2U CN202022920948U CN214270532U CN 214270532 U CN214270532 U CN 214270532U CN 202022920948 U CN202022920948 U CN 202022920948U CN 214270532 U CN214270532 U CN 214270532U
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Abstract
The utility model discloses a concentrated solution system is strained to electrooxidation method treatment film. Comprises a pretreatment unit, an ultrafiltration treatment unit and an electrooxidation treatment unit; the pretreatment unit comprises a concentrated solution storage tank 2, a concentrated solution lifting pump 3, a dosing device 4, a stirrer 5, an adsorption reactor 1, a sludge discharge pump 24 and a sludge storage tank 23; the ultrafiltration treatment unit comprises an ultrafiltration water inlet pump 6, an ultrafiltration reflux pump 7, an ultrafiltration reactor 8, an ultrafiltration water production pump 9, an ultrafiltration water production tank 10 and a blower 22; the electro-oxidation treatment unit comprises an electrolyte delivery pump 11, a negative pressure pump 12, an electro-oxidation water production tank 13, an electrolysis power supply 14, an electro-oxidation device 15, a cleaning water tank 16, a heat exchanger 17, an electro-oxidation water inlet pump 18, a circulating tank 19, a spray absorption tower 20 and an absorption liquid spray pump 21. The utility model discloses adopt tertiary stage treatment to waste water, effectively reduced follow-up advanced treatment load, reduced holistic treatment cost and strengthened the treatment effeciency.
Description
Technical Field
The utility model belongs to the technical field of water pollution control, in particular to concentrated solution system is strained to electrooxidation treatment membrane, this system is applicable to the processing of the difficult biochemical organic industrial waste water of other high concentrations equally.
Background
The landfill leachate is organic wastewater with complex components and difficult to treat, and the common treatment process of the landfill leachate in China at present is pretreatment, biochemical treatment and advanced treatment. The object of advanced treatment is mainly organic matters, dissolved matters and the like which are difficult to biodegrade, and the adopted advanced treatment technology is mainly membrane treatment (nanofiltration/reverse osmosis) to further remove the organic matters, ammonia nitrogen, total nitrogen and the like which are difficult to degrade in the percolate. About 20-30% of concentrated solution is generated in the nanofiltration or reverse osmosis treatment process, is high-concentration organic wastewater with complex components, and generally has poor biochemical property.
At present, the concentrated solution treatment method mainly adopts a physical and chemical method, and comprises adsorption, coagulating sedimentation, a membrane treatment technology, advanced oxidation, evaporation and the like.
However, the treatment cost of the concentrated solution is generally higher and cannot be widely applied, so a treatment process with low treatment cost and good treatment effect is urgently needed for treating the concentrated solution of the landfill leachate.
The electrooxidation technique has the following characteristics: electron transfer occurs between the electrode and the solution without the need for addition of oxidizing or reducing agents; the generated strong oxide oxidizes the organic matters into carbon dioxide and water, so that secondary pollution is avoided; the reaction condition is mild, can be carried out at normal temperature and normal pressure, and is praised as the environment-friendly technology of the 21 st century by the scientific and technological community.
Disclosure of Invention
The utility model discloses to the problem that concentrated solution is difficult to handle is strained to current landfill leachate membrane, provide a concentrated solution system is strained to membrane is handled to electrooxidation method.
The technical solution of the utility model is that: a membrane filtration concentrate treatment system by an electrooxidation method comprises a pretreatment unit, an ultrafiltration treatment unit and an electrooxidation treatment unit;
the pretreatment unit comprises a concentrated solution storage tank, a concentrated solution lifting pump, a dosing device, a stirrer, an adsorption reactor, a sludge discharge pump and a sludge storage tank;
the ultrafiltration treatment unit comprises an ultrafiltration water inlet pump, an ultrafiltration reflux pump, an ultrafiltration reactor, an ultrafiltration water production pump, an ultrafiltration water production tank and a blower;
the adsorption reactor is connected with the ultrafiltration reactor through an ultrafiltration water inlet pump;
the electrooxidation treatment unit comprises an electrolyte delivery pump, a negative pressure pump, an electrooxidation water production tank, an electrolysis power supply, an electrooxidation device, cleaning water, a heat exchanger, an electrooxidation water inlet pump, a circulating tank, a spray absorption tower and an absorption liquid spray pump;
the ultrafiltration reactor is connected with the circulating tank through an ultrafiltration water production pump, an ultrafiltration water production tank and an electrolyte delivery pump.
According to the embodiment of the utility model, the upper part of the adsorption reactor is cylindrical, the lower part is conical, the central position of the bottom of the adsorption reactor is provided with a sludge discharge hole, and a dosing device and a stirrer are arranged in the adsorption reactor; the concentrated solution storage tank is connected with the adsorption reactor through a lift pump; the sludge discharge hole is connected with a sludge storage tank through a sludge discharge pump.
According to the embodiment of the utility model, a filter membrane filtering device is arranged inside the ultrafiltration reactor; the ultrafiltration reactor is provided with an ultrafiltration reflux pump at the upper part of the tank body, and the other end of the ultrafiltration reflux pump is connected with the upper part of the adsorption reactor; and the bottom of the ultrafiltration reactor is provided with an air blower.
According to the embodiment of the utility model, the bottom of the circulating tank is connected with the bottom of the electrooxidation device after passing through the heat exchanger through the electrooxidation water inlet pump; a negative pressure pump is arranged at the upper part of the circulating groove; the upper part of the circulating groove is also connected with the upper part of the electric oxidation device.
According to the embodiment of the utility model, the upper part of the electro-oxidation device is respectively connected with the electro-oxidation water production tank and the cleaning water tank; the lower part of the cleaning water tank is connected with an electrooxidation water inlet pump.
According to the embodiment of the utility model, the electrooxidation device is connected with the electrolysis power supply.
According to the utility model discloses, the negative pressure pump is connected and is sprayed the absorption tower bottom, sprays the absorption tower and connects the absorption liquid and spray the pump.
According to the embodiment of the utility model, the electrooxidation device comprises an anode unit and a cathode unit;
the anode unit comprises a movable handle, an anode plate group, a fixing bolt, a sealing plate and a pulley; the movable handle is arranged outside the sealing plate, the fixed bolt and the pulley are arranged at the upper part of the anode unit, and the anode plate group is horizontally suspended in the anode unit;
the cathode unit comprises a slide way, a fixed screw hole, a water outlet, a cathode plate group and a water inlet; the slide way, the fixing screw hole and the water outlet are arranged at the upper part of the cathode unit, the water inlet is arranged at the lower part of the cathode unit, and the cathode plate group is horizontally suspended in the cathode unit;
when the electrooxidation device works, the anode unit and the cathode unit are assembled and combined through the pulleys and the slide ways and are fixed through the fixing bolts and the fixing screw holes, the electrooxidation device forms a whole under the action of the sealing plate, the anode plate group and the cathode plate group are placed in a staggered and suspended mode to form more than 2 layers of electrooxidation substrate groups, and the anode plate group and the cathode plate group are respectively connected with the anode and the cathode of an electrolytic power supply.
The utility model has the beneficial technical effects that:
(1) the membrane filtration concentrated solution is subjected to dosing precipitation through the pretreatment unit, suspended substances in the solution are effectively removed, and the purpose of reducing the treatment load of a subsequent treatment unit is achieved; the concentration of organic matters in the wastewater is reduced through an ultrafiltration unit, the COD value is effectively reduced, and finally, the wastewater is oxidized through an electrooxidation device; by carrying out early-stage treatment on the wastewater, the treatment effect is obviously improved, the treatment cost of the wastewater is reduced, and the service lives of the ultrafiltration membrane and the electrode are prolonged; because the wastewater is subjected to three-level grading treatment, the subsequent advanced treatment load is effectively reduced, the overall treatment cost is reduced, and the treatment efficiency is enhanced;
(2) the air blower is arranged on the ultrafiltration unit and is used for effectively treating the filtered impurities on the surface of the filter membrane of the ultrafiltration unit and prolonging the service life of the ultrafiltration unit;
(3) the electrooxidation treatment unit is provided with the clean water tank, and the electrooxidation device can be cleaned by using clean water after electrooxidation, so that not only is the precipitated garbage of the electrooxidation device treated, but also the operation cost is reduced;
(4) the electrooxidation device adopts a combined mode of the anode unit and the cathode unit, and the device can be more conveniently cleaned and maintained by splitting the electrooxidation device.
Drawings
FIG. 1 is a schematic diagram of a membrane filtration concentrate system for electro-oxidation treatment.
FIG. 2 is a structural view of an electrooxidation apparatus.
In the figure: 1. an adsorption reactor; 2. a concentrated solution storage tank; 3. a concentrate lift pump; 4. a dosing device; 5. a stirrer; 6. an ultrafiltration water intake pump; 7. an ultrafiltration reflux pump; 8. an ultrafiltration reactor; 9. an ultrafiltration water production pump; 10. an ultrafiltration water production tank; 11. an electrolyte delivery pump; 12. a negative pressure pump; 13. an electrooxidation water producing tank; 14. an electrolysis power supply; 15. an electro-oxidation device; 16. cleaning the water tank; 17. a heat exchanger; 18. electro-oxidation water inlet pump; 19. a circulation tank; 20. spraying an absorption tower; 21. an absorption liquid spray pump; 22. an aeration blower; 23. a sludge storage tank; 24. a sludge discharge pump; 25. a handle; 26. 27, fixing bolts; 28. a sealing plate; 29. a pulley; 30. a slideway; 31. fixing screw holes; 32. a water outlet; 33. a cathode plate group; 34. a water inlet.
Detailed Description
The present invention will be further explained below.
An apparatus for treating membrane-filtered concentrated solution by electrooxidation method comprises a pretreatment unit, an ultrafiltration treatment unit, and an electrooxidation treatment unit.
The pretreatment unit consists of a concentrated solution storage tank 2, a concentrated solution lifting pump 3, a dosing device 4, a stirrer 5, an adsorption reactor 1, a sludge discharge pump 24 and a sludge storage tank 23.
The upper part of the adsorption reactor 1 is cylindrical, the lower part of the adsorption reactor 1 is conical, a sludge discharge hole is formed in the center of the bottom of the adsorption reactor 1, and sludge formed by natural sedimentation is conveyed into a sludge storage tank 23 through a sludge discharge pump 24 in the sludge discharge hole.
A dosing device 4 and a stirrer 5 are arranged in the adsorption reactor 1; the concentrated solution storage tank 2 is connected with the adsorption reactor 1 through a lift pump 3; the sludge discharge hole is connected with a sludge storage tank 23 through a sludge discharge pump 24.
The concentrated solution in the concentrated solution storage tank 2 is conveyed to the adsorption reactor 1 through the lift pump 3, and is mixed with the medicament added in the medicament adding device 4 under the action of the stirrer 5.
The ultrafiltration treatment unit consists of an ultrafiltration water inlet pump 6, an ultrafiltration reflux pump 7, an ultrafiltration reactor 8, an ultrafiltration water production pump 9, an ultrafiltration water production tank 10 and an air blower 22.
The adsorption reactor 1 is connected with an ultrafiltration reactor 8 through an ultrafiltration water inlet pump 6; the solution after adsorption in the adsorption reactor 1 enters the ultrafiltration reactor 8 under the action of the ultrafiltration water inlet pump 6.
A filter membrane filtering device is arranged inside the ultrafiltration reactor 8; the ultrafiltration reactor 8 is provided with an ultrafiltration reflux pump 7 at the upper part of the tank body, and the other end of the ultrafiltration reflux pump 7 is connected with the upper part of the adsorption reactor 1; the bottom of the ultrafiltration reactor 8 is provided with a blower 22.
The filtered filtrate in the ultrafiltration reactor 8 enters the electro-oxidation unit under the action of the ultrafiltration water-producing pump 9, and the filtered impurities fall off from the filter membrane under the action of the blower 22) and are precipitated at the bottom of the ultrafiltration reactor 8 under the action of gravity.
The electro-oxidation treatment unit consists of an electrolyte delivery pump 11, a negative pressure pump 12, an electro-oxidation water production tank 13, an electrolysis power supply 14, an electro-oxidation device 15, a cleaning water tank 16, a heat exchanger 17, an electro-oxidation water inlet pump 18, a circulating tank 19, a spray absorption tower 20 and an absorption liquid spray pump 21; the ultrafiltration reactor 8 is connected with a circulating tank 19 through an ultrafiltration water producing pump 9, an ultrafiltration water producing tank 10 and an electrolyte delivery pump 11.
The bottom of the circulating tank 19 is connected with the bottom of the electrooxidation device 15 after passing through the heat exchanger 17 by the electrooxidation water inlet pump 18; the upper part of the circulating groove 19 is provided with a negative pressure pump 12; the upper part of the circulating groove 19 is also connected with the upper part of the electric oxidation device 15.
The upper part of the electric oxidation device 15 is respectively connected with an electric oxidation water production tank 13 and a cleaning water tank 16; the lower part of the cleaning water tank 16 is connected with an electric oxidation water inlet pump 18.
The electro-oxidation device 15 is connected with an electrolysis power supply 14.
The negative pressure pump 12 is connected with the bottom of the spray absorption tower 20, and the spray absorption tower 20 is connected with an absorption liquid spray pump 21.
The ultrafiltration water after passing through the ultrafiltration processing unit is stored in an ultrafiltration water production tank 10 under the action of an ultrafiltration water production pump 9, then enters a circulating tank 19 through an electrolyte delivery pump 11, the solution in the circulating tank 19 enters an electrooxidation device 15 through an electrooxidation water inlet pump 18 after passing through a heat exchanger 17, and the electrooxidation processing is carried out on the electrolyte through an electrolysis power supply 14.
And if the treated solution after the electro-oxidation meets the discharge standard, directly discharging the solution into the electro-oxidation water production tank 13 and the cleaning water tank 16, and if the discharged water does not meet the standard, discharging the produced water into the circulating tank 19 for refluxing and continuing electrolysis.
When the electric oxidation device 15 stops working, clean water in the cleaning water tank 16 can enter the heat exchanger 17 and the electric oxidation device 15 through the electric oxidation water inlet pump 18 to clean the device, and the cleaned cleaning water is discharged into the circulating tank 19.
The circulation tank 19 is provided with a negative pressure pump 12, and the electrolyte to be circulated in the circulation tank 19 is passed through the circulation tank 19 in a baffled manner.
Gas generated by electrooxidation enters the bottom of the spray absorption tower 20 under the action of the negative pressure pump 12 and moves from the bottom to the top of the spray absorption tower 20 under the action of air pressure, absorption liquid in the spray absorption tower 20 enters the top of the spray absorption tower 20 under the action of the absorption liquid spray pump 21 and moves from the top to the bottom of the spray absorption tower 20 under the action of gravity, and the gas and the absorption liquid generated by electrooxidation complete tail gas absorption through reverse mass transfer in the spray absorption tower 20.
The electro-oxidation device 15 includes an anode unit and a cathode unit.
The anode unit comprises a movable handle 25, an anode plate group 26, a fixing bolt 27, a sealing plate 28 and a pulley 29; the movable handle 25 is arranged outside the sealing plate 28, the fixing bolt 27 and the pulley 29 are arranged at the upper part of the anode unit, and the anode plate group 26 is horizontally suspended in the anode unit.
The cathode unit comprises a slide way 30, a fixing screw hole 31, a water outlet 32, a cathode plate group 33 and a water inlet 34; the slide way 30, the fixing screw hole 31 and the water outlet 32 are arranged at the upper part of the cathode unit, the water inlet 34 is arranged at the lower part of the cathode unit, and the cathode plate group 33 is horizontally suspended in the cathode unit.
When the electrooxidation device 15 works, the anode unit and the cathode unit are assembled and combined through the pulley 29 and the slide way 30 and are fixed through the fixing bolt 27 and the fixing screw hole 31, the electrooxidation device 15 forms a whole under the action of the sealing plate 28, the anode plate group 26 and the cathode plate group 33 are arranged in a staggered and suspended mode to form an electrooxidation substrate group with more than 2 layers, and the anode plate group 26 and the cathode plate group 33 are respectively connected with the anode and the cathode of the electrolysis power supply 14.
Under the action of the electrolysis power supply 14, carrying out electro-oxidation treatment on the electrolyte entering from the water inlet 34, and discharging the treated solution out of the water outlet 32; when the electrooxidation device 15 needs to be cleaned, the anode unit and the cathode unit can be detached through the pulley 29 and the slide way 30 by unscrewing the fixing bolt 27 on the anode unit and the fixing screw hole 31 on the cathode unit and then pulling the moving handle 25 on the anode unit, and then the device can be cleaned and maintained.
Example (b): the advanced treatment of the aged percolate of the simple domestic garbage landfill is carried out by adopting equipment for treating membrane filtration concentrated solution by an electrooxidation method.
Old garbage percolate → membrane treatment → electro-oxidation method treatment of membrane filtration concentrated solution → discharge after reaching standards.
The water inlet and outlet process parameters are shown in Table 1.
TABLE 1 old landfill leachate Water in and out Process parameters
After membrane treatment, 30% of concentrated solution of aged landfill leachate is treated by adopting an electrooxidation method, and indexes such as effluent CODcr, total nitrogen and the like can reach the discharge standard of GB16889-2008 'pollution control Standard for municipal solid waste landfill'.
Claims (8)
1. A membrane filtration concentrate treatment system by an electrooxidation method is characterized by comprising a pretreatment unit, an ultrafiltration treatment unit and an electrooxidation treatment unit;
the pretreatment unit comprises a concentrated solution storage tank (2), a concentrated solution lifting pump (3), a dosing device (4), a stirrer (5), an adsorption reactor (1), a sludge discharge pump (24) and a sludge storage tank (23);
the ultrafiltration treatment unit comprises an ultrafiltration water inlet pump (6), an ultrafiltration reflux pump (7), an ultrafiltration reactor (8), an ultrafiltration water production pump (9), an ultrafiltration water production tank (10) and a blower (22);
the adsorption reactor (1) is connected with an ultrafiltration reactor (8) through an ultrafiltration water inlet pump (6);
the electro-oxidation treatment unit comprises an electrolyte delivery pump (11), a negative pressure pump (12), an electro-oxidation water production tank (13), an electrolysis power supply (14), an electro-oxidation device (15), a cleaning water tank (16), a heat exchanger (17), an electro-oxidation water inlet pump (18), a circulating tank (19), a spray absorption tower (20) and an absorption liquid spray pump (21);
the ultrafiltration reactor (8) is connected with the circulating tank (19) through an ultrafiltration water production pump (9), an ultrafiltration water production tank (10) and an electrolyte delivery pump (11).
2. The system of claim 1, wherein: the upper part of the adsorption reactor (1) is cylindrical, the lower part of the adsorption reactor (1) is conical, a sludge discharge hole is formed in the center of the bottom of the adsorption reactor (1), and a dosing device (4) and a stirrer (5) are arranged in the adsorption reactor (1); the concentrated solution storage tank (2) is connected with the adsorption reactor (1) through a lift pump (3); the sludge discharge hole is connected with a sludge storage tank (23) through a sludge discharge pump (24).
3. The system of claim 1, wherein: a filter membrane filtering device is arranged inside the ultrafiltration reactor (8); an ultrafiltration reflux pump (7) is arranged at the upper part of the tank body of the ultrafiltration reactor (8), and the other end of the ultrafiltration reflux pump (7) is connected with the upper part of the adsorption reactor (1); the bottom of the ultrafiltration reactor (8) is provided with a blower (22).
4. The system of claim 1, wherein: the bottom of the circulating tank (19) is connected with the bottom of the electro-oxidation device (15) after passing through the heat exchanger (17) through an electro-oxidation water inlet pump (18); a negative pressure pump (12) is arranged at the upper part of the circulating groove (19); the upper part of the circulating groove (19) is also connected with the upper part of the electric oxidation device (15).
5. The system of claim 1, wherein: the upper part of the electro-oxidation device (15) is respectively connected with an electro-oxidation water production tank (13) and a cleaning water tank (16); the lower part of the cleaning water tank (16) is connected with an electrooxidation water inlet pump (18).
6. The system of claim 1, wherein: the electro-oxidation device (15) is connected with an electrolysis power supply (14).
7. The system of claim 1, wherein: the negative pressure pump (12) is connected with the bottom of the spray absorption tower (20), and the spray absorption tower (20) is connected with the absorption liquid spray pump (21).
8. The system of claim 1, wherein: the electro-oxidation device (15) comprises an anode unit and a cathode unit;
the anode unit comprises a movable handle (25), an anode plate group (26), a fixing bolt (27), a sealing plate (28) and a pulley (29); the movable handle (25) is arranged outside the sealing plate (28), the fixed bolt (27) and the pulley (29) are arranged at the upper part of the anode unit, and the anode plate group (26) is horizontally suspended in the anode unit;
the cathode unit comprises a slide way (30), a fixing screw hole (31), a water outlet (32), a cathode plate group (33) and a water inlet (34); the slide way (30), the fixing screw hole (31) and the water outlet (32) are arranged at the upper part of the cathode unit, the water inlet (34) is arranged at the lower part of the cathode unit, and the cathode plate group (33) is horizontally suspended in the cathode unit;
when the electrooxidation device (15) works, the anode unit and the cathode unit are assembled and combined through the pulleys (29) and the slide ways (30), the fixing bolts (27) and the fixing screw holes (31) are used for fixing, the electrooxidation device (15) forms a whole under the action of the sealing plate (28), the anode plate group (26) and the cathode plate group (33) are placed in a staggered suspension mode to form more than 2 layers of electrooxidation substrate groups, and the anode plate group (26) and the cathode plate group (33) are respectively connected with the anode and the cathode of the electrolytic power supply (14).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022920948.2U CN214270532U (en) | 2020-12-08 | 2020-12-08 | Membrane filtration concentrate system is handled to electrooxidation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022920948.2U CN214270532U (en) | 2020-12-08 | 2020-12-08 | Membrane filtration concentrate system is handled to electrooxidation method |
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